GOOD GUIDELINE: In the Can

Stored properly in a cool, dry, and dark environment, canned goods have a long shelf life. According to the Food & Drug Administration, highly acidic foods like tomato sauce are safe for 18 months; low-acid foods like green beans or vegetables will keep even longer—up to five years. If your cans show signs of bulging or discoloration, though, toss them immediately, as these may be contaminated with bacteria.